/* ==========================================================================
   七帅 · 个人网站
   风格：暖调纸质编辑部 —— 奶油桌面上的白色圆角刊页
   参考：MIPLP（编辑部排版 / 引言卡）+ Essos（暖色 / 圆角容器 / 精选+侧栏）
   ========================================================================== */

/* ---------- 设计令牌 ---------- */
:root {
  --bg: #EFE7DA;            /* 页面奶油底 */
  --sheet: #FFFFFF;         /* 白色刊页 */
  --card: #F6F0E5;          /* 奶油卡片 */
  --card-deep: #F1E8D9;     /* 奶油卡片（深一档） */
  --ink: #211B13;           /* 主文字 */
  --ink-2: #57503F;         /* 次级文字 */
  --muted: #8A8071;         /* 弱化文字 */
  --line: #ECE3D2;          /* 分隔线 */
  --accent: #A9502C;        /* 陶土橙（唯一强调色） */
  --accent-deep: #8C3E1F;
  --accent-soft: #F3E2D6;   /* 陶土浅底 */
  --dark: #221B12;          /* 深棕黑（引言 / 页脚 / 高价卡） */
  --radius-sheet: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --shadow-card: 0 1px 2px rgba(60, 42, 24, 0.05), 0 12px 32px -16px rgba(60, 42, 24, 0.18);
  --shadow-lift: 0 2px 4px rgba(60, 42, 24, 0.06), 0 20px 44px -18px rgba(60, 42, 24, 0.28);
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
               "Microsoft YaHei", "Segoe UI", "Helvetica Neue", sans-serif;
  --font-serif: Georgia, "Songti SC", "STSong", "SimSun", serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---------- 基础 ---------- */
* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: #fff;
  color: var(--ink);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg { display: block; max-width: 100%; }

a { color: inherit; text-decoration: none; }

button { font: inherit; cursor: pointer; border: none; background: none; }

::selection { background: var(--accent); color: #fff; }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- 白色刊页容器 ---------- */
.sheet {
  max-width: none;
  margin: 0;
  background: var(--sheet);
  border-radius: 0;
  box-shadow: none;
}

.container {
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: clamp(20px, 4.5vw, 52px);
  padding-right: clamp(20px, 4.5vw, 52px);
}

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding-top: 18px;
  padding-bottom: 18px;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  border-radius: 0;
  transition: border-color 0.3s var(--ease);
}
.site-header.is-scrolled { border-bottom-color: var(--line); }

.logo { display: flex; align-items: baseline; gap: 10px; flex-shrink: 0; }
.logo-mark {
  font-family: var(--font-serif);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--ink);
}
.logo-sub {
  font-size: 10px;
  letter-spacing: 0.32em;
  color: var(--muted);
  text-transform: uppercase;
  transform: translateY(-2px);
}

.main-nav { display: flex; align-items: center; gap: clamp(18px, 2.4vw, 34px); }
.main-nav a {
  font-size: 14.5px;
  color: var(--ink-2);
  padding: 6px 2px;
  position: relative;
  transition: color 0.2s var(--ease);
  white-space: nowrap;
}
.main-nav a::after {
  content: "";
  position: absolute;
  left: 2px; right: 100%; bottom: 0;
  height: 2px;
  background: var(--accent);
  transition: right 0.28s var(--ease);
}
.main-nav a:hover { color: var(--ink); }
.main-nav a:hover::after { right: 2px; }
.main-nav a[aria-current="page"] { color: var(--ink); font-weight: 600; }
.main-nav a[aria-current="page"]::after { right: 2px; }

.header-actions { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 999px;
  font-size: 14.5px;
  font-weight: 600;
  line-height: 1;
  padding: 13px 24px;
  transition: background 0.2s var(--ease), color 0.2s var(--ease),
              border-color 0.2s var(--ease), transform 0.2s var(--ease);
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn svg { width: 15px; height: 15px; flex-shrink: 0; }

.btn-accent { background: var(--accent); color: #fff; }
.btn-accent:hover { background: var(--accent-deep); }

.btn-dark { background: var(--dark); color: #fff; }
.btn-dark:hover { background: #3A2E1E; }

.btn-ghost { background: transparent; color: var(--ink); border: 1.5px solid var(--line); }
.btn-ghost:hover { border-color: var(--ink); }

.btn-outline-light { background: transparent; color: #fff; border: 1.5px solid rgba(255,255,255,0.45); }
.btn-outline-light:hover { border-color: #fff; background: rgba(255,255,255,0.08); }

.btn-sm { padding: 10px 18px; font-size: 13.5px; }
.btn-lg { padding: 16px 30px; font-size: 15.5px; }

.link-more {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  transition: color 0.2s var(--ease), gap 0.25s var(--ease);
}
.link-more:hover { color: var(--accent); gap: 11px; }
.link-more svg { width: 15px; height: 15px; }

/* ---------- 分类速览条（编辑部风格） ---------- */
.topic-strip {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding-top: 13px;
  padding-bottom: 13px;
}
.topic-strip-inner {
  display: flex;
  align-items: center;
  gap: clamp(18px, 3vw, 40px);
  overflow-x: auto;
  scrollbar-width: none;
}
.topic-strip-inner::-webkit-scrollbar { display: none; }
.topic-strip a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  color: var(--ink-2);
  white-space: nowrap;
  transition: color 0.2s var(--ease);
}
.topic-strip a::before {
  content: "";
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}
.topic-strip a:hover { color: var(--accent); }

/* ---------- 精选区：大卡 + 最新侧栏 ---------- */
.hero {
  display: grid;
  grid-template-columns: 1.65fr 1fr;
  gap: clamp(22px, 3vw, 34px);
  padding-top: clamp(24px, 3.4vw, 40px);
  padding-bottom: clamp(30px, 4vw, 52px);
  align-items: stretch;
}

.feature-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  min-height: 480px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  color: #fff;
  isolation: isolate;
}
.feature-card .feature-bg {
  position: absolute;
  inset: 0;
  z-index: -2;
  width: 100%;
  height: 100%;
}
.feature-card::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(180deg, rgba(24,15,7,0) 30%, rgba(24,15,7,0.28) 55%, rgba(24,15,7,0.78) 100%);
}
.feature-body { padding: clamp(22px, 3vw, 32px); }
.feature-card h1,
.feature-card .feature-title {
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1.32;
  font-weight: 700;
  letter-spacing: 0.01em;
  max-width: 21em;
  margin: 14px 0 16px;
  transition: transform 0.35s var(--ease);
}
.feature-card:hover h1,
.feature-card:hover .feature-title { transform: translateY(-3px); }
.feature-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(255,255,255,0.82);
}

/* 分类 chip（Essos 风格：奶油底 + 彩点） */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 252, 246, 0.92);
  color: var(--ink);
  border-radius: 999px;
  padding: 7px 15px;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
  width: fit-content;
}
.chip::before {
  content: "";
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}
.chip-plain { background: var(--card); }

/* 最新发布侧栏 */
.latest { display: flex; flex-direction: column; min-width: 0; }
.latest-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}
.section-label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.28em;
  color: var(--muted);
  text-transform: uppercase;
}
.latest-list { list-style: none; display: flex; flex-direction: column; }
.latest-item {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  align-items: center;
}
.latest-item:last-child { border-bottom: none; }
.latest-thumb {
  width: 72px; height: 72px;
  border-radius: var(--radius-md);
  overflow: hidden;
  flex-shrink: 0;
}
.latest-item h3 {
  font-size: 15px;
  line-height: 1.5;
  font-weight: 600;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color 0.2s var(--ease);
}
.latest-item a:hover h3 { color: var(--accent); }
.latest-item .cat { color: var(--accent); font-weight: 600; }
.latest-item .meta { margin-top: 6px; }

.meta {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 12.5px;
  color: var(--muted);
}
.meta .dot { width: 3px; height: 3px; border-radius: 50%; background: currentColor; opacity: 0.7; }

/* ---------- 引言区（MIPLP 风格：引言卡 + 宣言） ---------- */
.mission {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: clamp(22px, 3vw, 34px);
  padding-top: clamp(10px, 1.6vw, 18px);
  padding-bottom: clamp(44px, 5.5vw, 72px);
  align-items: center;
}
.quote-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  min-height: 380px;
  padding: clamp(24px, 3vw, 34px);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  color: #fff;
  isolation: isolate;
}
.quote-card .feature-bg { position: absolute; inset: 0; z-index: -2; width: 100%; height: 100%; }
.quote-card::after {
  content: "";
  position: absolute; inset: 0; z-index: -1;
  background: linear-gradient(200deg, rgba(15,10,5,0.05), rgba(15,10,5,0.55) 90%);
}
.quote-mark {
  font-family: var(--font-serif);
  font-size: 88px;
  line-height: 0.6;
  margin-bottom: auto;
  opacity: 0.9;
}
.quote-card blockquote {
  font-family: var(--font-serif);
  font-size: clamp(24px, 2.6vw, 30px);
  line-height: 1.5;
  font-weight: 700;
  letter-spacing: 0.02em;
}
.mission-text h2 {
  font-size: clamp(24px, 2.8vw, 32px);
  line-height: 1.5;
  font-weight: 700;
  letter-spacing: 0.01em;
}
.mission-text p {
  margin-top: 18px;
  color: var(--ink-2);
  font-size: 16px;
  max-width: 34em;
}
.mission-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }

/* ---------- 信任数据条 ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  margin-bottom: clamp(44px, 5.5vw, 72px);
}
.stat {
  padding: 26px clamp(14px, 2vw, 28px);
  border-left: 1px solid var(--line);
}
.stat:first-child { border-left: none; }
.stat .num {
  font-family: var(--font-serif);
  font-size: clamp(28px, 3vw, 38px);
  font-weight: 700;
  color: var(--ink);
  line-height: 1.2;
}
.stat .num em { font-style: normal; color: var(--accent); }
.stat .label { font-size: 13.5px; color: var(--muted); margin-top: 4px; }

/* ---------- 通用区块头 ---------- */
.section { padding-bottom: clamp(44px, 5.5vw, 72px); }
.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 26px;
}
.section-head .kicker {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.28em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 10px;
}
.section-head h2 {
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  letter-spacing: 0.01em;
}
.section-head .sub { color: var(--muted); font-size: 14.5px; margin-top: 8px; max-width: 36em; }

/* ---------- 内容卡片网格（Essos 卡片） ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(18px, 2.4vw, 28px);
}
.post-card {
  background: var(--card);
  border-radius: var(--radius-lg);
  padding: 14px 14px 22px;
  display: flex;
  flex-direction: column;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.post-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lift); }
.post-card .cover {
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 16 / 10;
  margin-bottom: 18px;
}
.post-card .cover svg, .post-card .cover img { width: 100%; height: 100%; object-fit: cover; }
.post-card .body { padding: 0 8px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.post-card h3 {
  font-size: 17.5px;
  line-height: 1.5;
  font-weight: 700;
  letter-spacing: 0.01em;
}
.post-card p {
  font-size: 14px;
  color: var(--ink-2);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.post-card .meta { margin-top: auto; padding-top: 12px; }

/* ---------- 产品阶梯 ---------- */
.pricing {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(18px, 2.4vw, 28px);
  align-items: stretch;
}
.price-card {
  border: 1.5px solid var(--line);
  border-radius: var(--radius-lg);
  padding: clamp(24px, 2.6vw, 32px);
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), border-color 0.3s var(--ease);
  background: var(--sheet);
}
.price-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-card); border-color: #DCD0BB; }
.price-card .tier { font-size: 13px; font-weight: 700; letter-spacing: 0.2em; color: var(--muted); text-transform: uppercase; }
.price-card h3 { font-size: 21px; font-weight: 700; margin-top: 8px; }
.price-card .price { font-family: var(--font-serif); font-size: 40px; font-weight: 700; margin: 14px 0 2px; }
.price-card .price small { font-family: var(--font-sans); font-size: 13.5px; font-weight: 500; color: var(--muted); margin-left: 8px; letter-spacing: 0; }
.price-card .desc { font-size: 14px; color: var(--ink-2); min-height: 3em; }
.price-card ul { list-style: none; margin: 18px 0 26px; display: flex; flex-direction: column; gap: 11px; }
.price-card li { display: flex; gap: 10px; font-size: 14.5px; color: var(--ink-2); }
.price-card li svg { width: 17px; height: 17px; color: var(--accent); flex-shrink: 0; margin-top: 4px; }
.price-card .btn { margin-top: auto; width: 100%; }

.price-card.is-featured {
  background: var(--dark);
  border-color: var(--dark);
  color: #fff;
}
.price-card.is-featured:hover { box-shadow: 0 24px 48px -18px rgba(34, 27, 18, 0.5); }
.price-card.is-featured .tier { color: #B7A98F; }
.price-card.is-featured .price small { color: #B7A98F; }
.price-card.is-featured .desc { color: #CFC4B0; }
.price-card.is-featured li { color: #E4DACA; }
.price-card.is-featured li svg { color: #E08B5C; }
.price-card.is-featured .badge {
  position: absolute; transform: translateY(-34px);
  background: var(--accent); color: #fff;
  font-size: 12px; font-weight: 700; letter-spacing: 0.12em;
  border-radius: 999px; padding: 6px 14px;
}
.price-card { position: relative; }

/* ---------- 产品价目列表（首页预览用） ---------- */
.price-list { list-style: none; border-top: 1px solid var(--line); }
.price-row {
  display: grid;
  grid-template-columns: 110px 1fr auto auto;
  gap: 20px;
  align-items: center;
  padding: 22px 4px;
  border-bottom: 1px solid var(--line);
  transition: background 0.2s var(--ease);
}
.price-row:hover { background: #FBF7EF; }
.price-row .tag-cell .chip { font-size: 12px; padding: 5px 12px; }
.price-row h3 { font-size: 16.5px; font-weight: 700; line-height: 1.4; transition: color 0.2s var(--ease); }
.price-row a:hover h3 { color: var(--accent); }
.price-row .p-desc { font-size: 13.5px; color: var(--muted); margin-top: 3px; }
.price-row .p-price { font-family: var(--font-serif); font-size: 22px; font-weight: 700; white-space: nowrap; }
.price-row .p-price small { font-family: var(--font-sans); font-size: 12px; color: var(--muted); font-weight: 500; margin-left: 4px; }
.price-row.is-hot { background: var(--card); }
.price-row.is-hot .p-price { color: var(--accent); }
.price-row .arrow { color: var(--muted); transition: color 0.2s var(--ease), transform 0.25s var(--ease); }
.price-row .arrow svg { width: 18px; height: 18px; }
.price-row:hover .arrow { color: var(--accent); transform: translateX(4px); }

/* 两列产品卡（知识产品组） */
.pricing-duo { grid-template-columns: repeat(2, 1fr); max-width: 880px; }

/* ---------- 研究列表 ---------- */
.report-list { list-style: none; border-top: 1px solid var(--line); }
.report-row {
  display: grid;
  grid-template-columns: 92px 110px 1fr auto;
  gap: 18px;
  align-items: center;
  padding: 20px 4px;
  border-bottom: 1px solid var(--line);
  transition: background 0.2s var(--ease);
}
.report-row:hover { background: #FBF7EF; }
.report-row .date { font-size: 13px; color: var(--muted); font-variant-numeric: tabular-nums; }
.report-row h3 { font-size: 16px; font-weight: 600; line-height: 1.5; transition: color 0.2s var(--ease); }
.report-row .tag-cell .chip { font-size: 12px; padding: 5px 12px; }
.report-row a:hover h3 { color: var(--accent); }
.report-row .arrow { color: var(--muted); transition: color 0.2s var(--ease), transform 0.25s var(--ease); }
.report-row .arrow svg { width: 18px; height: 18px; }
.report-row:hover .arrow { color: var(--accent); transform: translateX(4px); }

.disclaimer {
  margin-top: 26px;
  background: var(--card);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.8;
}
.disclaimer strong { color: var(--ink-2); }

/* ---------- 关于预览 ---------- */
.about-preview {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: clamp(26px, 4vw, 56px);
  align-items: center;
}
.portrait {
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4 / 5;
  position: relative;
}
.portrait svg, .portrait img { width: 100%; height: 100%; object-fit: cover; object-position: center 18%; }
.values { list-style: none; margin: 24px 0 30px; display: flex; flex-direction: column; gap: 0; }
.values li {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  align-items: start;
}
.values li:first-child { border-top: 1px solid var(--line); }
.values .v-num {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--accent);
  line-height: 1.6;
}
.values h4 { font-size: 16.5px; font-weight: 700; }
.values p { font-size: 14px; color: var(--ink-2); margin-top: 3px; }

/* 信念卡片（关于页） */
.belief-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(18px, 2.4vw, 28px); }
.belief {
  background: var(--card);
  border-radius: var(--radius-lg);
  padding: clamp(24px, 3vw, 32px);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.belief:hover { transform: translateY(-4px); box-shadow: var(--shadow-card); }
.belief .v-num { font-family: var(--font-serif); font-size: 34px; font-weight: 700; color: var(--accent); line-height: 1; }
.belief h3 { font-size: 18px; font-weight: 700; margin: 16px 0 8px; }
.belief p { font-size: 14.5px; color: var(--ink-2); }

/* ---------- 阅读书架 ---------- */
.shelf-block + .shelf-block { margin-top: 34px; }
.shelf-label {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 14.5px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 16px;
}
.shelf-label .count { font-size: 12.5px; font-weight: 500; color: var(--muted); }
.shelf-grid { display: grid; gap: 20px; }
.shelf-reading { grid-template-columns: repeat(6, 1fr); }
.shelf-finished { grid-template-columns: repeat(8, 1fr); gap: 16px; }
.book { min-width: 0; display: block; }
.book .b-cover {
  aspect-ratio: 2 / 3;
  border-radius: 10px;
  overflow: hidden;
  background: var(--card);
  box-shadow: 0 1px 2px rgba(60, 42, 24, 0.08), 0 8px 18px -8px rgba(60, 42, 24, 0.22);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.book .b-cover img { width: 100%; height: 100%; object-fit: cover; }
a.book:hover .b-cover { transform: translateY(-5px); box-shadow: 0 2px 4px rgba(60,42,24,0.08), 0 18px 30px -12px rgba(60,42,24,0.35); }
.book h3 {
  font-size: 13px;
  font-weight: 600;
  line-height: 1.45;
  margin-top: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color 0.2s var(--ease);
}
a.book:hover h3 { color: var(--accent); }
.book p {
  font-size: 11.5px;
  color: var(--muted);
  margin-top: 3px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ---------- 文章详情页 ---------- */
.article-wrap { max-width: 780px; margin: 0 auto; padding-top: clamp(24px, 3.5vw, 44px); padding-bottom: clamp(40px, 5vw, 64px); }
.article-top { margin-bottom: 26px; }
.article-wrap .chip { margin-bottom: 18px; }
.article-title {
  font-size: clamp(26px, 3.6vw, 38px);
  font-weight: 700;
  line-height: 1.42;
  letter-spacing: 0.01em;
  margin: 6px 0 18px;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  color: var(--muted);
  padding-bottom: 26px;
  border-bottom: 1px solid var(--line);
}
.article-body { padding-top: 10px; }
.article-body p {
  font-size: 16.5px;
  line-height: 2;
  color: #2E271D;
  margin: 1.35em 0;
  letter-spacing: 0.01em;
}
.article-body p:first-child { margin-top: 1.6em; }
.article-pics { display: grid; gap: 14px; margin: 26px 0; }
.article-pics img { width: 100%; border-radius: var(--radius-md); border: 1px solid var(--line); }
.article-foot { margin-top: 40px; padding-top: 26px; border-top: 1px solid var(--line); }

/* ---------- 微信 CTA 横幅 ---------- */
.cta-band {
  background: var(--dark);
  color: #fff;
  border-radius: var(--radius-lg);
  padding: clamp(28px, 4vw, 48px);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
  margin-bottom: clamp(44px, 5.5vw, 72px);
  position: relative;
  overflow: hidden;
  isolation: isolate;
}
.cta-band::before {
  content: "";
  position: absolute;
  right: -80px; top: -120px;
  width: 380px; height: 380px;
  background: radial-gradient(circle, rgba(169, 80, 44, 0.35), transparent 65%);
  z-index: -1;
}
.cta-band h2 { font-size: clamp(22px, 2.6vw, 30px); font-weight: 700; line-height: 1.45; }
.cta-band p { color: #CFC4B0; margin-top: 12px; font-size: 15px; max-width: 30em; }
.cta-band .cta-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }
.qr-card {
  background: #fff;
  color: var(--ink);
  border-radius: var(--radius-md);
  padding: 16px;
  text-align: center;
  flex-shrink: 0;
}
.qr-card svg { width: 148px; height: 148px; }
.qr-card img { width: 100%; max-width: 168px; height: auto; border-radius: 10px; }
.qr-card figcaption { font-size: 12.5px; color: var(--muted); margin-top: 10px; }

/* 语言切换 */
.lang-toggle {
  border: 1.5px solid var(--line);
  border-radius: 999px;
  padding: 8px 14px;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--ink-2);
  transition: all 0.2s var(--ease);
}
.lang-toggle:hover { border-color: var(--ink); color: var(--ink); }

/* 文章英文提示 */
.article-lang-note {
  margin: 20px 0 0;
  background: var(--card);
  border-radius: var(--radius-md);
  padding: 12px 18px;
  font-size: 13.5px;
  color: var(--ink-2);
  display: none;
}
html[lang="en"] .article-lang-note { display: block; }

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--dark);
  color: #CFC4B0;
  border-radius: 0;
  margin-top: clamp(20px, 3vw, 40px);
}
.footer-main {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: clamp(24px, 3.5vw, 48px);
  padding-top: clamp(36px, 4.5vw, 56px);
  padding-bottom: clamp(28px, 3.5vw, 44px);
}
.footer-brand .logo-mark { color: #fff; }
.footer-brand p { font-size: 14px; margin-top: 14px; max-width: 24em; line-height: 1.9; }
.footer-col h5 {
  color: #8F8371;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  margin-bottom: 18px;
}
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 11px; }
.footer-col a { font-size: 14.5px; transition: color 0.2s var(--ease); }
.footer-col a:hover { color: #fff; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 22px;
  padding-bottom: 26px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  font-size: 13px;
  color: #8F8371;
}

/* ---------- 内页通用 ---------- */
.page-hero { padding-top: clamp(36px, 5vw, 64px); padding-bottom: clamp(30px, 4vw, 48px); }
.page-hero .kicker {
  font-size: 12px; font-weight: 700; letter-spacing: 0.28em;
  color: var(--accent); text-transform: uppercase; margin-bottom: 14px;
}
.page-hero h1 {
  font-size: clamp(30px, 4.2vw, 46px);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: 0.01em;
  max-width: 22em;
}
.page-hero .lede { margin-top: 18px; font-size: 16.5px; color: var(--ink-2); max-width: 38em; }

/* 时间线 */
.timeline { list-style: none; border-left: 2px solid var(--line); margin-left: 6px; }
.timeline li { position: relative; padding: 0 0 34px 30px; }
.timeline li::before {
  content: "";
  position: absolute;
  left: -8px; top: 7px;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--sheet);
  border: 3px solid var(--accent);
}
.timeline .t-year {
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.04em;
}
.timeline h3 { font-size: 18px; font-weight: 700; margin-top: 4px; }
.timeline p { font-size: 14.5px; color: var(--ink-2); margin-top: 6px; max-width: 36em; }

/* 筛选 chips */
.filter-bar { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 30px; }
.filter-chip {
  border: 1.5px solid var(--line);
  border-radius: 999px;
  padding: 9px 18px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--ink-2);
  background: var(--sheet);
  transition: all 0.2s var(--ease);
}
.filter-chip:hover { border-color: var(--ink); color: var(--ink); }
.filter-chip.is-active { background: var(--dark); border-color: var(--dark); color: #fff; }

/* 平台卡片 */
.platform-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(16px, 2vw, 24px); }
.platform-card {
  border: 1.5px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), border-color 0.3s var(--ease);
}
.platform-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-card); border-color: #DCD0BB; }
.platform-card .p-icon {
  width: 44px; height: 44px;
  border-radius: 12px;
  background: var(--accent-soft);
  color: var(--accent);
  display: grid;
  place-items: center;
  margin-bottom: 10px;
}
.platform-card .p-icon svg { width: 21px; height: 21px; }
.platform-card h3 { font-size: 16.5px; font-weight: 700; }
.platform-card p { font-size: 13.5px; color: var(--ink-2); }
.platform-card .p-handle { font-size: 12.5px; color: var(--muted); margin-top: auto; padding-top: 14px; }
.platform-card .p-qr { display: block; margin-top: 12px; border-radius: 10px; overflow: hidden; border: 1px solid var(--line); }
.platform-card .p-qr img { width: 100%; height: auto; display: block; transition: transform 0.3s var(--ease); }
.platform-card .p-qr:hover img { transform: scale(1.04); }

/* FAQ */
.faq { border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 22px 4px;
  font-size: 16.5px;
  font-weight: 600;
  cursor: pointer;
  transition: color 0.2s var(--ease);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary:hover { color: var(--accent); }
.faq summary .f-icon {
  width: 30px; height: 30px;
  border-radius: 50%;
  border: 1.5px solid var(--line);
  display: grid; place-items: center;
  flex-shrink: 0;
  transition: all 0.25s var(--ease);
}
.faq summary .f-icon svg { width: 14px; height: 14px; }
.faq details[open] summary .f-icon { background: var(--accent); border-color: var(--accent); color: #fff; transform: rotate(45deg); }
.faq .f-body { padding: 0 4px 24px; color: var(--ink-2); font-size: 15px; max-width: 44em; }

/* ---------- 入场动效 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal.is-visible { opacity: 1; transform: none; }
.reveal-d1 { transition-delay: 0.08s; }
.reveal-d2 { transition-delay: 0.16s; }
.reveal-d3 { transition-delay: 0.24s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
  .reveal { opacity: 1; transform: none; }
}

/* ---------- 移动端菜单 ---------- */
.nav-toggle { display: none; width: 42px; height: 42px; border-radius: 12px; border: 1.5px solid var(--line); place-items: center; }
.nav-toggle svg { width: 20px; height: 20px; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .card-grid { grid-template-columns: repeat(2, 1fr); }
  .platform-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-main { grid-template-columns: 1fr 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .shelf-reading { grid-template-columns: repeat(4, 1fr); }
  .shelf-finished { grid-template-columns: repeat(6, 1fr); }
  .stat:nth-child(3) { border-left: none; }
  .stat { border-top: 1px solid var(--line); }
  .stat:nth-child(-n+2) { border-top: none; }
}

@media (max-width: 860px) {
  .main-nav {
    position: absolute;
    top: calc(100% + 10px);
    left: 16px; right: 16px;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    background: var(--sheet);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    padding: 12px;
    box-shadow: var(--shadow-lift);
    display: none;
  }
  .belief-grid { grid-template-columns: 1fr; }
  .main-nav.is-open { display: flex; }
  .main-nav a { padding: 12px 14px; border-radius: 12px; font-size: 15px; }
  .main-nav a:hover { background: var(--card); }
  .main-nav a::after { display: none; }
  .main-nav a[aria-current="page"] { background: var(--card); }
  .nav-toggle { display: grid; }
  .header-actions .btn-ghost { display: none; }

  .site-header { position: relative; top: auto; border-radius: 0; }
  .hero { grid-template-columns: 1fr; }
  .feature-card { min-height: 380px; }
  .mission { grid-template-columns: 1fr; }
  .quote-card { min-height: 300px; }
  .about-preview { grid-template-columns: 1fr; }
  .portrait { max-width: 420px; }
  .pricing { grid-template-columns: 1fr; }
  .price-card.is-featured .badge { transform: none; position: static; width: fit-content; margin-bottom: 12px; }
  .report-row { grid-template-columns: 1fr auto; }
  .report-row .date, .report-row .tag-cell { display: none; }
  .price-row { grid-template-columns: 1fr auto auto; }
  .price-row .tag-cell, .price-row .p-desc { display: none; }
  .pricing-duo { grid-template-columns: 1fr; max-width: none; }
  .cta-band { grid-template-columns: 1fr; }
  .qr-card { justify-self: center; }
}

@media (max-width: 620px) {
  .card-grid { grid-template-columns: 1fr; }
  .platform-grid { grid-template-columns: 1fr 1fr; }
  .platform-card { padding: 18px; }
  .footer-main { grid-template-columns: 1fr; gap: 28px; }
  .stats { grid-template-columns: 1fr 1fr; }
  .section-head { flex-direction: column; align-items: flex-start; }
  .shelf-reading { grid-template-columns: repeat(3, 1fr); gap: 14px; }
  .shelf-finished { grid-template-columns: repeat(4, 1fr); gap: 12px; }
  .book h3 { font-size: 12px; }
}

@media (max-width: 420px) {
  .platform-grid { grid-template-columns: 1fr; }
}